Tank cap



FIG. 1 is a front view of a tank cap in accordance with the present invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a cross-sectional view taken through line 7—7 of FIG. 1;

FIG. 8 is cross-sectional view taken through line 8—8 of FIG. 6; and,

FIG. 9 is a perspective view taken from the front side. 

The ornamental design for a tank cap, as shown and described. 